Having read @mikewalsh's glowing praise of Studio 13.37 in another thread, and having a particular interest in audio stuff, I decided to give it a spin.
So I downloaded the iso, copied it to a Ventoy USB, and booted it up to have an initial preview. All good, no issues, and looks very promising. Next I decided to do a frugal install, so extracted the files from iso into folder, then copied that onto a portable hard drive. Ext 3 and boot flag set.
Then things got weird. Came to run GRUB4DOS, and for some mysterious reason it hadn't recognised it as a frugal install. What was displayed was that it had recognised it as a full install. Ran it anyway but needless to say it wouldn't boot. Can't remember now what the error message was.
I didn't do anything any differently to what I've done with countless other Puppies. So if anyone's got any ideas as what on earth is going on I would much appreciate your comments. I've now wiped the drive so I can start again.
Thanks